Particle Theory from UV to IR

Abstract

Particle physics continues to be driven by a remarkably small set of fundamental questions: the structure of the Higgs potential and its connection to early-universe dynamics, the approximate and emergent symmetries of the Standard Model as an effective field theory, and the nature of the dark sector across cosmic history. Although experimental priorities and theoretical tools have evolved, these questions have not gone away. While much attention has recently been devoted to the landscape of infrared phenomenology, advances in our understanding of quantum field theory and quantum gravity enable new progress on the core questions of particle physics from the ultraviolet. Symmetry has re-emerged as a powerful organizing principle linking progress across collider physics and cosmology. Consistency conditions such as crossing symmetry, unitarity, and analyticity have become constructive tools through the bootstrap program, while cosmological observables exhibit symmetry structures that tightly constrain inflationary dynamics and late universe cosmology. At the same time, generalized global symmetries have enriched our understanding of the properties of effective field theories and their ultraviolet completions.
The central challenge is to connect these theoretical developments to rapidly advancing experimental and observational frontiers. This requires translating formal progress into phenomenology, leveraging effective field theory as a common language, deploying fundamental model building in a targeted and motivated way, and embracing new computational paradigms.
This workshop seeks to bring together these threads from the ultraviolet to the infrared, fostering a synergy that unites theoretical insights, experimental innovations, and computational breakthroughs in the pursuit of answers to the unsolved mysteries of particle physics and the nature of the Universe